A rugged, expandable, and brilliantly accessible carry-on travel backpack driven by a simple truth: no two trips are the same. Features top, side, front and rear access via weatherproof #8 and #10 UltraZips, which can withstand decades of use thanks to their proprietary abrasion-resistant thread. Meets international carry-on size requirements, but expands to be a 45L gear-hauler and collapses to be a 35L day bag, making it unmatched for 1-bag travel. Quick-access pockets for keys, glasses, passport, etc. Hugely expandable side pockets for water bottles, tripods, and more. Padded laptop + tablet sleeves. Main cavity is divisible into 2 compartments via a zippered mesh sleeve. Tuck-away shoulder straps and hip belt. 360-degree grab handles. Cleverly concealed external carry straps. All packed within a sleek, weatherproof 100% recycled 400D nylon canvas shell with 900D bottom liner. Works seamlessly with Peak Design Packing Cubes, Camera Cubes, and Pouches, sold separately. Organize clothes, shoes, toiletries, cords, adapters, and photo/video gearfrom a single camera/drone to a full professional kitwhich you can quickly access from the sides or rear of the bag. Fair Trade Certified and 100% carbon neutral. Higher price of Coyote colorway due to material & development costs (see specs). Comparing to the 30L? The 45L is better for: - 1-bag-travel for trips 4 days and longer. - More access and organization options. - Trips where you need multiple jackets, pairs of shoes, or other bulky clothing - Carrying camera gear: better compatibility with PD Camera Cubes, plus dual side access. Specifications for Peak Design 45L Travel Backpack: Manufacturer: Peak Design Size: One Size Gender: Unisex Weight: 4.5 lb Pack Application: Travel Capacity: 45 liters Pack Volume: 45 liters Hydration Compatible: No Fabric/Material: 400D Nylon Versa Shell Body Material: 900D poly Length: 22 in Pack Loading: Top Features of Peak Design 45L Travel Backpack International carry-on approved Rear access via burly #10 UltraZip Dual side access via burly #10 UltraZips Front zip panel for additional access, storage, & organization Soft-lined zippered top pocket for keys, glasses, passport, etc. Expansion zips for fitting more or compressing your load Padded shoulder & waist straps stow under magnetic flaps for worry-free bag-checking Axial strap attachments provide all-day comfort for all body types Stowable sternum strap 360-degree grab handles External carry straps stow beneath a magnetic flap Hugely expandable side pockets for water bottles, tripods, more Padded, dedicated laptop and tablet sleeves Theft-deterrent zipper pulls Protected luggage tag holder Luggage pass-through for roller bag carry Weatherproof 100% recycled 400D nylon canvas shell High-visibility grey interior Rugged 900D waterproof bottom liner Clip-in points for Peak Design Camera Cubes Ultralight padded foam provides security and structure around entire bag Designed to fit Peak Design Packing/Camera Cubes (fit 3 units + space for more) Fair Trade Certified and 100% carbon neutral Lifetime guarantee Functional differences vs. 30L More access points: rear, side, and front access zips Dividable main volume: internal divider sleeve zips up to creates 2 compartments when needed Integrated hip belt: stowable padded hip belt for heavier loads Compressible: compression snaps slim down the profile for use as a day bag Hidden pockets: 2 hidden external zip pockets for cash, passport, etc. Room for more: room for 3 units of PD cubes, plus bonus space for pouches, jackets, shoes, etc. More photo-capable: fits camera cubes in un-expanded state, and allows quick side access to cameras and lenses Package Contents: Peak Design 45L Travel Backpack